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GRAPHS AND FUNCTIONSambining functions to write a new function that models a real-

GRAPHS AND FUNCTIONSambining functions to write a new function that models a real-example-1
User Ivo Merchiers
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1 Answer

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26 votes

Solution:

Given that the production cost will include a one-time fixed cost for editing and additional cost for each book printed, where the total production cost is expressed as


\begin{gathered} C=750+18.95N \\ where \\ N\text{ is number of books} \end{gathered}

The total revenue is expressed as


R=31.90N

Given that P is the profit made, recall that


Revenue\text{ = Cost + Profit}

By substitution, we have


\begin{gathered} 31.90N=(750+18.95N)+Profit \\ \Rightarrow Profit=31.90N-(750+18.95N) \\ open\text{ parentheses,} \\ Profit=31.90N-750-18.95N \\ collect\text{ like terms,} \\ Profit=(31.90-18.95)N-750 \\ \Rightarrow Profit=12.95N-750 \end{gathered}

Hence, the equation relation P to N is expressed as


P=12.95N-750

User Iiridayn
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